User's Manual

Operation DMH Series VHF Radio
Page 3-14 BK RADIO
below shows how the priority channels and the transmit channels are selected in
each mode.
Mode A Mode B Mode C
Priority Channel
Channel Knob Preset Preset
Transmit Channel
Channel Knob Channel Knob Priority Channel
3.11.3 PRIORITY MODE A WITH SCAN
In Priority Mode A, the priority channel is set by the Channel Selector knob. Priority
Mode A is seldom used by itself because the radio receives and transmits only on the
knob-selected channel.
When Scan and Priority Mode A are enabled, scanning occurs until an active scan
channel is found. The radio receives the message while continuing to check the
priority (knob-selected) channel. The display shows the scan channel.
If the priority channel becomes active during this message, the Priority indicator
illuminates. The radio changes to the priority channel and holds for the duration of
the message. The display shows the priority channel.
To reply to a message on the priority channel, press the PTT switch and transmit on
the priority channel. Once activity ceases on the priority channel, the radio returns to
scan operation.
3.11.4 PRIORITY MODE B
With Priority Scan on and Channel Scan off, the radio can receive on the knob-
selected channel while sampling the priority channel. If the priority channel becomes
active, the Priority indicator lights up illuminates. The radio changes to the priority
channel and holds for the duration of the transmission
To reply to a message on the priority channel, turn the Channel Selector knob to the
priority channel, and then transmit.
3.11.4.1 PRIORITY MODE B WITH SCAN
With Priority Scan and Channel Scan on, the radio scans until it locks on to an active
channel. The radio continues to sample the priority channel while listening to the
active scan channel.
If activity occurs on the priority channel, the radio overrides the active scan channel,
changes to the priority channel, and holds for the duration of the transmission.
To reply to a message on the priority channel, turn the Channel Selector knob to the
priority channel, and then transmit. Once activity has ceased on the priority channel,
the radio returns to scan operation.
3.11.5 PRIORITY MODE C
With Priority Scan on and Channel Scan off, the radio samples the fixed priority
channel at the preset rate. If activity occurs on the priority channel, the radio switches